Silent Retreats: Benefits, Risks, and Who Should Think Twice

Silent retreats can leave people calmer and more focused, and they can also unsettle a minority badly enough to need care. Pooling 21 studies of traditional meditation retreats, a 2017 meta-analysismeta-analysis: A study that combines the results of earlier studies on the same question into one overall estimate. Pooling makes the estimate more precise, but it cannot repair the studies it pools: a meta-analysis of surveys is still survey evidence.Full entry in the glossary led by Bassam Khoury of McGill University in Canada linked retreats with moderate improvements, both from before to after and against control groups, and with larger effects on anxiety, depression and stress.¹ None of those studies measured unpleasant experiences, and in a 2019 survey of regular meditators, people who had ever been on a retreat reported such experiences more often than people who had not.²

So a silent retreat suits someone in steady mental health who already meditates, picks a center that screens applicants and keeps a teacher within reach, and starts with a day or a weekend rather than ten days, a cautious step that no study has tested. If you have recent trauma or post-traumatic stress disorder (PTSD), past psychosis or bipolar disorder, or severe depression, discuss the plan with a clinician before you book. The practice is the one explained in our guide to mindfulness, from definition to evidence, stretched from minutes to whole days.

What happens at a silent retreat?

At a silent retreat you meditate through most of your waking hours on a fixed timetable without talking to the other participants, though you can usually still speak to the teacher and the staff. The best-documented format is the 10-day Vipassana course in the tradition of S.N. Goenka, whose published code of discipline spells out every hour.³

The day starts with a bell at 4 a.m. and ends with lights out at 9:30 p.m. By our count of that timetable, scheduled meditation adds up to nearly 11 hours a day, broken by meals, a rest hour and an evening talk. “Noble silence” rules out gestures and written notes as well as speech, and lasts until the morning of the last full day. Students agree to stay for the whole course, remain on site and suspend exercise programs, and men and women are kept apart.³ The organizers say the silence keeps practice unbroken between sittings, and that courses worldwide run on donations.⁴

Researchers who study retreats describe the same pattern as typical: long and frequent sittings, silence, a secluded setting without phones, internet or books, an early wake-up bell, little exercise and often a changed diet.² There is no chat over breakfast, no podcast on a walk and no message home to say the first day was hard.

Before you apply anywhere, read the full timetable and rules. Then picture an ordinary afternoon on day four, with nothing to do but sit, walk and eat in silence, and ask yourself honestly whether you could stay.

What are the benefits of a silent retreat?

The benefits measured most often after traditional meditation retreats, according to the McGill-led review, are lower anxiety, depression and stress and higher mindfulness and compassion scores, and the gains held at follow-up. Meditation style made no clear difference, and studies in which mindfulness scores rose more tended to show larger effects. The abstract gives no count of silent retreats among them.¹

The evidence is promising but loose. We had only the abstract. It reports large differences between studies in design, retreat type, length and outcomes, and says these limit what the pooled result can tell you.¹ self-selectionself-selection: When the people in a study chose to take part, or chose the thing being studied, rather than being picked or assigned. Volunteers and choosers can differ from everyone else, so the result may not apply more widely or may reflect who chose rather than what they chose.Full entry in the glossary matters too: those who choose a retreat are motivated, can spare the time and often already meditate, so part of any before-and-after gain may reflect who goes rather than what the retreat did.

The best-known randomized test of an intensive retreat is the Shamatha Project in the US, which assigned experienced meditators by lot to a three-month retreat or a waiting list. It combined long solitary practice with daily group sessions and weekly meetings with the teacher, so it was not silent throughout.

The study

Limited evidence

Sixty screened meditators, three months away, and better scores on a lab attention test

In the Shamatha Project (MacLean and colleagues, 2010), sixty experienced meditators were split at random between a three-month retreat in the Colorado mountains, practicing about 5 hours a day, and a waiting list whose members did the same retreat afterwards. On a computer test of fine visual discrimination and sustained attention, the retreat group improved more than the waiting-list group, and the improvement in discrimination was still there about 5 months later. The study was funded by the Fetzer Institute and private donors.⁵

Because it was randomized, the trial supports a causal claim, but only for a lab attention test, and only in people who had already done at least three 5-day retreats and passed a selection process, including a psychiatric screen, that admitted about half of applicants. Those who kept up longer daily practice afterwards held their gains better, though that link is a correlation.⁵

For a reader deciding whether to go, the evidence fits a retreat as a way to deepen a practice you already have while your health is steady, not as a fix for a crisis. Someone who meditates most mornings and wants a longer stretch resembles the people studied; someone booking a retreat in the week after a breakup or a bereavement does not.

Can a silent retreat be bad for you?

A silent retreat can be bad for some people. In a 2019 cross-sectionalcross-sectional: Describes a study that measures everyone in its sample at a single point in time. Because the possible cause and the outcome are recorded together, it can show that two things occur together but not which of them came first.Full entry in the glossary survey of 1,232 regular meditators, recruited internationally online by a University College London team, 29 percent of those who had ever attended a retreat reported a particularly unpleasant meditation-related experience, against 20 percent of those who had not. The survey could not say whether those experiences happened on retreat, and retreat-goers may differ in other ways, so the authors treat it as an association, not proof that retreats cause harm.²

The most detailed picture comes from the Varieties of Contemplative Experience study, a 2017 project from Brown University in the US led by Jared Lindahl and Willoughby Britton. The team interviewed 60 Western Buddhist meditators who had gone through difficult experiences, plus teachers and clinicians. For about three-quarters of the meditators, the difficulty began during or just after a retreat, and fear, anxiety, panic or paranoia was the most widely reported kind of experience. Interviewees commonly described the silence and social isolation of retreat as a risk factor, and sometimes a change of setting was what eased the problem.⁶

The study recruited people precisely because they had struggled, so its figures describe that group, not how often retreats go wrong. It also found that coming home could be the hard part: changes that felt manageable in the meditation hall became problems at work or with family.⁶

Myth

If a retreat starts to feel frightening, the answer is to sit more and push through.

Fact

Meditators who struggled sometimes found that a change of setting, such as leaving the retreat, was what eased the problem.

Other evidence is weaker or points the other way. A 2022 US survey, recruited to mirror the adult population, found only a weak link between past retreat attendance and impairment, one that did not survive correction for multiple tests; few in that sample had been on a retreat.⁷ Across 83 studies of all kinds of meditation, a 2020 review led by Miguel Farias put the share of participants with adverse events at about 8 percent, though it varied widely between types of study, with anxiety and depression the most common; the authors add that they may occur in people with no previous mental health problems.⁸ A more direct test found no extra worsening: a 2026 study from Israel’s University of Haifa followed 89 adults on 6-day insight meditation retreats and 46 matched adults who stayed home, and those who went were no more likely to show a reliable worsening in mental health two weeks later. Attendees chose to go, and two weeks is a short window.⁹

Psychosis after meditation has been documented, mostly in single case reports. A 2022 review of 28 published case reports found that half the patients had precipitating factors such as insomnia, too little food, a history of mental illness, stress or drug use, and its authors say a causal link is hard to establish.¹⁰ Short sleep and changed meals are features of many retreat schedules, so it makes sense to protect both if you go.

1. The person: psychiatric, trauma and medical history, and what the person wants from practice
2. The practice: how much, how intensively and what kind: long retreat days rather than short daily sittings
3. Relationships: the teacher, the community, people outside it, and the setting, such as retreat silence
4. Health behaviors: sleep, food and exercise: too little of them tended to come before destabilizing experiences

Of these factors, you cannot change your history, but you can choose a gentler intensity, a teacher you can reach, someone at home who knows where you are, and enough sleep and food.

Who should not go on a silent meditation retreat?

People with a significant current mental health condition should not treat a silent retreat as therapy. The Goenka organization says it does not recommend its courses for them, and warns that even when someone’s mental health is stable, old symptoms may resurface during or after a course.³ The UK’s NHS puts it more broadly: mindfulness helps many people but not all, and some end up feeling worse.¹¹

Research can say little directly here, because trials such as the Shamatha Project screened these people out. Among Lindahl’s interviewees, about a third reported a psychiatric history and over 40 percent a trauma history, though without a comparison group that cannot show how much those histories add to risk.⁶ In the US population survey, people who reported childhood adversity were more likely to report meditation-related adverse effects.⁷

If you are going through a hard period, the Goenka organization asks applicants to describe their circumstances so it can advise them.⁴ Answer health questions on any application fully. A center that asks nothing about mental health has told you something about how it handles trouble.

Questions to ask before you book

A few direct questions sort careful retreat centers from careless ones: how intensive the schedule is, how the teachers were trained, whether applicants are screened, who you can talk to during the retreat, and what happens if you need to leave. The NCCIH suggests asking about the training and experience of any meditation instructor.¹²

Ask the retreat center

• How many hours of sitting a day, and when does the day start and end?
• How were the teachers trained, and how long have they led retreats?
• Does the application ask about mental health, and who reads it?
• Can I speak to a teacher privately, and how often?
• What happens if I need to leave early or see a doctor?
• Is there any support after the retreat ends?

A good center answers these plainly. Vague replies, or a promise that the retreat will heal a mental health problem, are reasons to look elsewhere.

How long should a first silent retreat be?

No study has compared first retreats of different lengths, so the answer rests on tradition and caution rather than data. The traditions set their own rules: the Goenka organization calls its 10-day course the minimum, saying shorter courses do not give students enough grasp of the technique.⁴ The Shamatha Project, by contrast, accepted only people who had already done at least three 5-day retreats before its three-month one.⁵

If your longest sitting so far is under half an hour, a cautious route is a day-long or weekend silent retreat first, then a longer one if that went well. Notice how you sleep, how you feel in the days afterwards, and whether you could ask for help when you needed it. Treat that as our suggestion; nobody has tested it. If you are still building a daily habit, a beginner’s ten-minute meditation routine is the better starting point, and the wider mindfulness and meditation guide covers apps and courses.

Signs that need help, on retreat or back home

Suicidal thoughts, urges to hurt yourself or a sense that you cannot stay safe need help right away, whether you are in the meditation hall or back home. Problems that linger after you leave, such as insomnia, panic, flashbacks or a sense that things feel unreal, call for a doctor’s appointment within days, not extra hours of practice.

The bottom line

A silent retreat is a strong dose of meditation: long sittings, early starts and no conversation, sometimes for ten days. For people in steady health who already practice, studies link retreats with less stress and sharper attention, but those studies rarely looked for harm, and in one interview study of meditators who struggled, most said the trouble began during or just after a retreat. Start shorter than you think, choose a center that screens and supports you, and if trauma or psychiatric illness is part of your history, see a clinician before you book.